[This report applies to ballo 5.17.0 which isn't selectable in the Version drop down above.] After my obligatory "akonadictl restart" after suspend, starting the baloo_indexer lead to crashes since the baloo-database for emails was still locked. The culprit as a baloo indexer process from yesterday that wasn't stopped by akonadictl (another bug?). After killing that process manually the new could start. A dialog telling the user why it has problems starting seems more graceful than just crashing ;-)
Generic issue: no error checking :( *** This bug has been marked as a duplicate of bug 368557 ***